Question

What is the opposite of the following:

100m above sea level

Answer 1

Hint: Opposite of up is down. Similarly, the opposite of above is below. Now, with this logic think of an answer for the question.

Complete answer: 

If we have some point which is 100m above sea level then the exact opposite of it will be 100m below the sea level.

Note - We can think of a mirror when we are being told to find opposite just think of finding the exact mirror image of that quantity.